.logo-icon-grande {  
    background-image: url( images/logo_227x227.png ) !important;  
}  
  
.logo-icon-media {  
    background-image: url( images/logo_113x113.png ) !important;  
}  

.logo-icon-pequena {  
    background-image: url( images/logo_22x22.png ) !important;  
}  
